Air filter for gas heaters



@ci. 8, 1356 B. c. BARTLEBAUGH 2,916,701

AIR FILTER FOR GAS HEATERS Filed Jan. 6, 1934 I 3 Sheets-Sheet 1 swam M @fit 8, 1935 B. C. BARTLEBAUGH AIR FILTER FOR GAS HEATERS 3 Sheets-Sheet 2.

Filed Jan. 6, 1934 3935- B. c. BARTLEBAUGH AIR FILTER FOR GAS HEATERS Filed Jan. 6, 1954 5 sheets-sheets Patented Oct. 8, 1935 UNITED STATES ATE-NT, OFFICE 2 Claims.

The present invention is directed to improvements in air filters for use in connection with gas heaters of the furnace type, that is to say a heater wherein the air is compelled to fiow through passages about a combustion chamber within the casing.

The primary object of the invention is to provide novel means to prevent soot and dust drawn into the heater with the incoming air from being injected into the room or space in which the heater is located, the construction being such that the ejected air will be effectively filtered in order that only clean air will be discharged.

Another object of the invention is to provide a device of this character wherein the filtering medium can be easily and quickly removed from the heater in order that all soot and dust collected may be removed therefrom in any manner seen fit.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of the heater.

Figure 2 is a longitudinal sectional view through the same.

Figure 3 is a vertical central sectional View.

Figure 4 is a sectional view on line 4-4 of Figure 3.

Figure 5 is a bottom plan view of the top plate of the heater.

Referring to the drawings, I designates a casing comprising inner and outer laterally spaced walls 2 and 3, which define an air chamber 4, the inner wall constituting in conjunction with the top 5a combustion chamber 3, said top being inclined downwardly in a direction to the front opening 1 of the casing.

A bafile plate 8 is supported in the combustion chamber 6 below the top 5 and has its rear edge spaced from the inner wall 2, as clearly shown in Fig. 3 in order to provide a passage 9.

The top II] of the casing is provided with an opening II through which the heated burn-over gases are discharged.

Spaced from the back wall 2 is a fire-wall I2 having a series of openings I3 formed therein, the purpose of which will appear later.

The lower edge of the fire-wall abuts a plate I4 constituting a bottom for the burner I5, said burner including a breast plate It having a plurality of jets I I, there being located under the plate I6 a gas discharge nozzle I8, the same being connected with a source of supply through the pipe I9.

Air from the room is admitted to the casing through the openings 20 formedin the sides and back of the outer wall 3 and openings 2| formed 5 in the front plate 22.

A deflector plate 23 is supported by the casing I and is extended downwardly to the front opening I, as clearly shown in Fig. 3.

It will be observed that the inner wall 2 is of 10 less length than the outer wall 3 in order that air entering the openings 20 and 2| will pass freely into the chamber 4 and be heated by the walls of the combustion chamber 6.

Secured to the top I0 and transversely of the opening ll thereof are parallel spaced channel bars 24 to which are secured the bolts 25. The bolts 25 serve to detachably secure the plate 26, constituting a supplemental top for the casing, spaced above the opening I I to permit heated air to pass freely from the casing. Ornamental knobs 21 removably engage the bolts 25 and serve to retain the plate 26 in place. 7

The plate 26 is provided with a depending marginal flange 28, and removably bolted to the 5 under surface of the plate are longitudinally and transversely extending metallic strips 29 and 30, respectively, which serve to clamp theelongated masses or sections of steel wool 3| and 32 firmly to said plate, as clearly shown in Fig. 5. The 1 masses are of such depth that they will depend from the plate and surround the opening II of the top ID in order that the heated air passing through said opening will also pass through the masses, thereby effectively filtering the out rush- 35 ing air. The masses are shown spaced slightly above the top I 0, but if desired they may rest thereon. A plate 33 is secured to the front of the 7 plate 26 and extends downwardly a sufficient distance to conceal the opening between the plate 26 and top Ill.

When gas from the burner I5 is ignited the hot unburned gases will rise and be directed rearwardly by the baffle plate 8 and top 5, and thence rapidly downwardly into the passage I3 behind the fire-wall I2. At the same time fresh air will be drawn through the opening 1 into the passage 9 and will be directed downwardly into the passage I3. The hot non-consumed gases will rapidly commingle with the air in the passage I3 and with the air drawn into the passage '9. This mixture of air and gas is blown through the openings I3 with considerable velocity, and this mixture is directed under pressure into the ascending flame of the burner, whereby the unburned gases are positively burned to eliminate the discharge of unburned gases into the room. This cycle of operation takes place as long as the burner is ignited, and the discharge of obnoxious odors and dangerous gases is positively eliminated.

What is claimed is:-

1. A device of the class described comprising a casing having an inlet and having an opening in its top, spaced bars bridging the opening, bolts extending upwardly from the bars and having shoulders thereon, a top plate removably engaged on the bolts and supported by said shoulders above the casing top, filtering masses, clamping strips secured to the under surface of the top plate and adapted to secure the masses to said top plate about the periphery thereof, whereby the masses will be removable with the top plate, said masses depending from the top plate to surround the .walls of the opening in the casing top.

2. A device of the class described comprising a casing having an air inlet and having an opening in its top, bolts carried by the casing and extending upwardly from the opening, a top plate removably engaged'on the bolts and supported thereby above the casing top and definining with said top an outlet passage, elongated filtering masses, and means to secure the masses to the under side of the top plate about the periphery thereof, whereby said masses are interposed in said outlet passage, and are removable with the top plate.

BENJAMIN C. BARTLEBAUGH. 

